BERLIN, Jan 2 (Reuters) - Talks between the German government and carmakers about updating exhaust emissions filtering systems on older diesel cars to avoid vehicle bans are ongoing, a transport ministry spokeswoman said on Wednesday.

The ministry last week released a document setting out guidelines for getting regulatory approval to install upgraded filtering systems, a solution favoured by environmentalists and consumer groups. Carmakers want customers to buy new cars with cleaner engines. (Reporting by Sabine Siebold, editing by Riham Alkousaa)